Ukrainian peace talks Monday amid heightened tensions after Ukraine's drone attack on Russian airfields, and unclaimed bridge explosions.

Ukrainian and Russian delegations met again in Istanbul on Monday to take part in the next round of U.S.-brokered peace talks.

Delegations from Russia and Ukraine met Monday in Turkey for their second round of direct peace talks in just over two weeks, although expectations were low for any significant progress on ending the3-year-old war after a string of stunning attacks over the weekend.